[9.x] Fixes restrictive type declaration in InteractsWithViews testing concern

[rbarden]

New PR to master for #36567

This PR removes the array type declaration on the InteractsWithViews concern used in testing. These methods should ultimately have the type declaration of Arrayable|array, but until the framework's minimum PHP version is increased to 8, the type declaration should be removed.

With this array type declaration, one must explicitly call ->toArray() on any Arrayable they are using, otherwise a TypeError is thrown: TypeError : Illuminate\Foundation\Testing\TestCase::view(): Argument #2 ($data) must be of type array, ...

public function test_view()
{
    $arrayable = new SomeArrayable();
    $this->view('post.form', $arrayable->toArray());
}

public function test_view()
{
    $arrayable = new SomeArrayable();
    $this->view('post.form', $arrayable);
}

[rbarden]

@taylorotwell Since Laravel 9.0 will now require PHP 8, do you want me to go ahead and update this PR to use the Arrayable|array type declaration instead of removing it entirely?

[rbarden]

@driesvints What are your thoughts on my question above? I'd be happy to add in the proper types now since laravel 9 is going to use php 8 and union types are allowed. I could update this PR or open a new one.

[driesvints]

Hey @rbarden. Not for now, thanks.